But head coach Jim Harbaugh says they are set at the position and that includes not bringing back wideout Randy Moss, who spent one season with the team and caught 28 passes for 434 yards and three touchdowns in 2012.

The top candidate to ascend to a major role is 2012 first-rounder A.J. Jenkins, who has spent the offseason adding muscle and working on his rapport with quarterback Colin Kaepernick.
It's quite the leap of faith for a player who was redshirted last season, failing to pass Ted Ginn and Kyle Williams on the depth chart.